Short Biography
K. Friedrich graduated in “Mechanical Engineering” and
earned 1978 his PhD degree in “Materials Science” at the
Ruhr-University Bochum in Germany. He was a Visiting
Assistant Professor with the Center for Composite Materials,
University of Delaware, USA, and worked as a Professor for
Polymers and Composites at the Technical University
Hamburg-Harburg, Germany. In 1990, he became Research
Director at the Institute for Composite Materials (IVW),
University of Kaiserslautern, Germany. He acts also as a
Scientific Board Member of various international journals in
the fields of materials science, composites, and tribology,
and he has published more than 800 journal/conference
papers, and several books related to fracture mechanics and
tribology of polymer (nano)composites.

The sliding wear
of black-fiber palm wood was first investigated under dry
conditions against smooth steel. Tests were carried out in
two different configurations, i.e. pin on disc and ring on
plate. In both cases, the transverse, in plane fiber
orientation resulted in the highest values of friction
coefficient and specific wear rate. The normal and parallel
fiber orientations showed a better performance. In all
cases, the coefficient of friction was rather high (average
range between 0.4 to 0.7) whereas the specific wear rates
varied between 10-6 to 10-5 mm3/Nm.
The latter are comparable to those of short fiber reinforced
thermoplastics. A following impregnation in various oils
reduced the wear rates, and the friction coefficients went
down to values between 0.1 and 0.3. The different efficiency
of the various oils was discussed.

Hyung-Kyu Kim is a principal
researcher of Korea Atomic Energy Research Institute in the
field of the mechanical design and failure analysis of
nuclear fuels for 32 years. He is also a professor of
University of Science and Technology (Nuclear and Radiation
Safety), and an adjunct professor of the School of
Mechanical Engineering in Chungnam National University. He
received the PhD degree from Korea Advanced Institute of
Science and Technology (Mechanical Engineering) in 1997. He
was a visiting scholar of the Dept. Engineering Science,
Oxford University, UK in 1997 and 2012 where a
two-dimensional contact shear and a complete contact problem
were studied with the Solid Mechanics Group in the Dept. His
research fields are Contact Mechanics, Tribology, Fracture
Mechanics, Fatigue Fracture, and Failure Analysis.

Conditions for Assuming a
Conformal Contact to be Non-Conformal

A transition
condition from a conformal contact to a non-conformal
contact is studied. A cylinder-hole and the Hertz contacts
are considered as a conformal and a non-conformal contact,
respectively. First, the theory of the contact between a
cylinder and a hole is revisited. The peak traction of it is
compared with the Hertzian peak. In the case of the
elastically similar materials’ contact, the non-conformal
contact can be assumed until the angle of contact reaches
almost 38% of the maximum possible angle of contact if the
difference in the traction peaks of the conformal and
non-conformal conatcts is set as 5%.

DR. PRASANTA KUMAR PADHI Steel Authority of India Limited, India

Short Biography

Prasanta Kumar Padhi graduated in
“Mechanical Engineering”, followed by post graduation in
“Production Engineering” and earned his Ph.D. degree on the
subject of “Tribo-performance Analysis of Blast Furnace Slag
reinforced Polymer Composite” at National Institute of
Technology, Odisha in India. He is presently working as
Deputy General Manager in one of the leading steel industry
i.e. M/s Steel Authority of India Limited, a Government of
India enterprises and operating from senior chair of Plant
Works Centre of Production,Panning and Control of Rourkela
Steel Plant. He has engaged in active research in the area
of composite materials since 2009 and has contributed 07
research papers to his credit which have been published in
various national and international journals of repute. He
has also presented 15 research papers in the area of
composites and optimization techniques at various national
and international conferences.He also serves as a senior
faculty of Art of Living, an NGO based world renowned
organisation founded by SRI SRI Ravi Shankar and teaches yoga and meditation.

Blast furnace
slag (BFSlag) is an industrial waste which is generated in
huge quantities during iron making in steel industries. The
present work attempts to utilize this solid waste BFSlag as
the filler material in composite making with polymers like
epoxy. The composites are characterized in regard to their
physical and mechanical properties. An attempt has been made
to improve the wear resistance of short glass fiber (SGF)
reinforced epoxy composites by incorporation of micro-sized
blast furnace slag (BFS) particles. A wealth of property
data has been generated for a series of BFS filled
epoxy/glass-epoxy. These material properties have been
determined by conducting physical and mechanical tests under
controlled laboratory conditions. Taguchi’s experimental
design approach integrated with neural computation has been
followed for the parametric appraisal and prediction of the
wear processes. The morphology of worn-out surfaces is then
examined by scanning electron microscopy (SEM) and possible
wear mechanisms are discussed. This study reveals that
addition of blast furnace slag improves the fracture
resistance of short glass-Epoxy composites significantly and
thus makes them suitable for tribological applications.

DR. JINJIN LI
Tsinghua University, China

Short Biography

Jinjin Li
received the BS degree in mechanical engineering from
University of Science and Technology of China in 2009, and
the PhD degree in mechanical engineering from Tsinghua
University, China in 2014. Li is currently an assistant
professor at Tsinghua University, China. His major research
areas include solid and liquid superlubricity, nanotribology
and friction theory. He has published more than 30 papers on
the international journals of Advanced Science, Journal of
Physical Chemistry Letters, Carbon, and so on (24 papers as
the first author). He has been awarded the 4th Hiwin award
for outstanding doctoral dissertation, first prize for
outstanding doctoral dissertation in Tsinghua University,
and outstanding postdoctor in Tsinghua University.

Superlubricity Behavior of Surfactant Micelles at the
Nanoscale

Attaching
appropriate molecular layers on the two sliding surfaces is
one of the most effective methods to achieve liquid
superlubricity at the nanoscale. In this paper, the recent
advances in the nanoscale superlubricity achieved by using
surfactant micelles in our group was reviewed and discussed.
First, the superlubricity conditions for surfactant micelles
is established by using atomic force microscopy (AFM), which
are the adsorption of surfactant micelles on the two
friction surfaces and the formation of the hydration on the
exposed headgroups. Second, the nonlinear behavior of
dissipation of frictional energy in the superlubricity
regime of surfactant micelles is observed and discussed,
which is attributed to the elastic deformation of the
adsorbed surfactant micelle layer. Third, the fluorinated
cationic surfactant micelle layer exhibits the self-recovery
behavior after a rupture caused by high normal pressure, and
the difference between the rupture and recovery pressures
leads to the hysteresis of friction force. Fourth, the
superlubricity of layered materials is achieved through
attaching sodium dodecyl sulfate micelles on the friction
surfaces, which is attributed to the extremely low shear
strength between the carbon chain and layered materials.
Finally, the problems and future on the superlubricity of
surfactant micelles at the nanoscale are discussed.